Engine

Question 1

What is Max trust?

Answer 1

14,200 lbs

Question 2

What engines are on the E-175?

Answer 2

General Electric CF34-8E5

Question 3

What type of engine is on the E-175?

Answer 3

Hi-bypass/dual-rotor turbofan

• 10-stage compressor with variable geometry/ 2-stage HP turbine
• 1 stage fan/4-stage LP turbine

Question 4

Engine Lubrication system

Answer 4

Each engine, IDG and the APU have their own independent system

Question 5

How can each engine be started?

Answer 5

• APU air
• Crossbleed air source
• External air start
• Windmilling start airborn

Question 6

How man igniters?

Answer 6

Two per engine

Question 7

Start sequence controlled by?

Answer 7

FADEC controller

Question 8

Normal starter sequence?

Answer 8

• N2 rotation 7% N2 - Ignition
• 20% N2 fuel flow (lights-off with in 5 sec) Normal access & oil pressure
• 50% N2 ignition off & starter cut-out Normal access & Stabilization

Question 9

How are thrust reversers actuated?

Answer 9

Hydraulically actuated

Question 10

What protects against inadvertent deployment?

Answer 10

FADEC provides interlock protection against inadvertent deployment
- Idle trust commanded if opened in flight

Question 11

ATTCS (automatic takeoff thrust control system)

Answer 11

• Controlled by FADEC
• Automatically provides max engine thrust (RSV) whenever its armed, thrust levers TOGA, and
  
  • Difference between N1 values > 15%
  • One engine failure during takeoff
  • One engine failure during go-around
  • Windshear detection
• Automatically armed for normal go-around (GA) mode`

Question 12

What is minimum oil pressure after engine start?

Answer 12

-25 psi

Question 13

What is the minimum PSI for crossbleed start?

Answer 13

• 40 psi

Question 14

When starting when is fuel introduced?

Answer 14

• Fuel is automatically introduced when N2 is 20% and as long as ITT IS 120 degrees or less.